JP2014186969A - Powder feeding device and electrode manufacturing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a powder feeding device capable of equally dispersing and feeding powder while suppressing destruction of particles constituting the powder, and an electrode manufacturing apparatus comprising the powder feeding device.SOLUTION: A powder feeding device 2 comprises: a case 6 in which a storage part 6a is formed for temporarily storing powder 10 and which includes a feeding port 6b formed on an upper end of the storage part 6a and a rectangular discharging port 6c formed on a lower end of the storage part 6a; a rotor 7 which is disposed within the case 6 and rotated to transfer the powder 10 in the storage part 6a to the discharging port 6c; and a mesh body 8 through which the powder 10 transferred to the discharging port 6c is passed. The powder feeding device 2 is configured to feed the powder 10 while dropping it from the discharging port 6c onto a top face of an electrode foil 5 which is horizontally displaced perpendicularly below the discharging port 6c. The rotor 7 has a brush shape including a plurality of bristle members 7b, 7b, ... substantially radially planted towards the outside in a radial direction around an axial center G of the rotor 7.

Description

  The present invention relates to a powder supply device for supplying an equal amount of powder to the upper surface of a sheet-like material to be supplied and a technique of an electrode manufacturing apparatus provided with the powder supply device.

  2. Description of the Related Art Conventionally, a powder supply apparatus that is an apparatus for supplying powder while being uniformly dispersed is known. For example, the technology is disclosed in Patent Document 1 shown below and is publicly known.

The powder supply apparatus according to Patent Document 1 is an apparatus that continuously supplies powder onto a sheet, and includes a chute for charging powder, a rolling member provided in the chute, and a lower part of the chute It is set as the structure provided with the mesh body provided in.
And while giving a vibration to a chute | shoot and rolling a rolling member in a chute | shoot, it is set as the structure supplied through a mesh body, disperse | distributing powder.

JP 2003-155124 A

  However, in the powder supply apparatus according to Patent Document 1, the flowability of the powder varies depending on the state of the powder charged into the chute, so that even if the same vibration is applied to the chute, the powder supply amount is constant. There was a problem of not becoming.

Further, in the conventional powder supply device, the rotational force of the rotor or the like is used to apply the shearing force to the powder charged in the powder supply device so that the powder is dissolved and dispersed. In some cases, the particles constituting the powder are destroyed by the applied shear force.
Then, when the particles are broken and made into fine particles, the fluidity of the powder deteriorates. Therefore, in the conventional powder supply apparatus configured to apply a shearing force by the rotor, the powder is supplied while being uniformly dispersed. It was difficult.

  The present invention has been made in view of such a current problem, and a powder supply apparatus capable of supplying powder while being uniformly dispersed while suppressing breakage of particles constituting the powder, and the same It aims at providing the electrode manufacturing apparatus provided with a powder supply apparatus.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, in claim 1, a storage portion that is a gap for temporarily storing powder as a supply object is formed, and an opening for introducing the powder formed at the upper end of the storage portion is formed. A case having a charging port that is a portion, a discharge port that is a rectangular opening for discharging the powder formed at a lower end of the storage unit, and the storage unit disposed in the case and rotated to rotate the storage unit. A rotor that is a means for transferring the powder of the part to the discharge port, and a mesh body that covers the lower end of the discharge port that allows the powder transferred to the discharge port to pass therethrough, A powder supply device for supplying the powder while dropping from the discharge port onto an upper surface of a supply material that is a supply target of the powder, which is horizontally displaced vertically below the discharge port, The rotor is halfway around the rotor axis. And it has a brush-like form having a plurality of bristles planted in a substantially radially toward the outward.

  In Claim 2, the said several bristle member has electroconductivity.

  According to a third aspect of the present invention, the apparatus further includes a first discharge electrode that performs corona discharge on the powder that has passed through the mesh body.

  According to a fourth aspect of the present invention, a squeegee for leveling the powder deposited on the upper surface of the material to be supplied is further provided.

  In Claim 5, the 2nd discharge electrode which corona discharges with respect to the said to-be-supplied material before the said powder deposits, and the foreign material released from the to-be-supplied material by the corona discharge by said 2nd discharge electrode And a suction means for sucking.

  In the present invention, the powder is a granulated particle comprising an electrode active material, a binder, and a conductive material.

  In claim 7, a storage part that is a gap for temporarily storing powder as a supply object is formed, and an opening for charging the powder formed at the upper end of the storage part is provided. A case having an inlet, a case having a rectangular opening for discharging the powder formed at a lower end of the reservoir, and a case disposed in the case and rotated to rotate the reservoir. A rotor that is a means for transferring the powder to the discharge port; and a mesh body that covers the lower end of the discharge port that allows the powder transferred to the discharge port to pass through the discharge port. A powder supply device for supplying the powder while dropping from the discharge port onto an upper surface of the supply material, which is a supply target of the powder, which is displaced horizontally below A transport device for transporting and transporting by the transport device An electrode manufacturing apparatus comprising: a press apparatus that presses the material to which the powder is supplied by the powder supply apparatus, wherein the rotor is centered on an axis of the rotor. It has a brush-like form provided with a plurality of bristle members implanted substantially radially.

  As effects of the present invention, the following effects can be obtained.

In the first and second aspects, the powder can be uniformly dispersed without destroying the particles constituting the powder.
In addition, the brush-like rotor sweeps the powder adhering to the inner wall of the reservoir and the mesh body, preventing the accumulation of powder in the reservoir and clogging of the powder in the mesh body, and stable supply The state can be maintained.

  In the third to fifth aspects, the powder can be dispersed more evenly.

  According to the sixth aspect of the invention, even when the particles constituting the powder are granulated particles that are more easily broken, the powder can be evenly dispersed without breaking the particles.

According to the seventh aspect of the present invention, the electrode can be manufactured by uniformly dispersing the powder with respect to the electrode foil without destroying the particles constituting the powder.
Thereby, a composite material layer can be formed with uniform thickness, and the quality improvement of an electrode can be aimed at.

The schematic diagram which shows an electrode manufacturing apparatus provided with the powder supply apparatus which concerns on 1st embodiment of this invention. The schematic diagram which shows the whole structure of the powder supply apparatus which concerns on 1st embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS Explanatory drawing of the case which comprises the powder supply apparatus which concerns on 1st embodiment of this invention, (a) The plane schematic diagram which shows a case, (b) The cross-sectional schematic diagram which shows a case. The side surface schematic diagram of the rotor which comprises the powder supply apparatus which concerns on 1st embodiment of this invention. The expansion schematic diagram which shows the particle | grains which comprise the powder which is a supply object by a powder supply apparatus, and its destruction condition. The figure which shows the time change of the powder supply amount by a powder supply apparatus. The schematic diagram which shows an electrode manufacturing apparatus provided with the powder supply apparatus which concerns on 2nd embodiment of this invention.

Next, embodiments of the invention will be described.
First, the whole structure of an electrode manufacturing apparatus provided with the powder supply apparatus according to the first embodiment of the present invention will be described with reference to FIGS.
In the following description, the direction of arrow A shown in FIG. 1 is defined as vertically upward, and the direction of arrow B is defined as vertically downward.
In the electrode manufacturing apparatus shown in the present embodiment, the powder is supplied to the upper surface of the material to be supplied positioned below the powder supply apparatus by supplying the powder while dropping the powder from the upper side to the lower side. It is configured to deposit the body.

  As shown in FIG. 1, an electrode manufacturing apparatus 1 according to an embodiment of the present invention is an apparatus for manufacturing an electrode for a secondary battery, without applying electrode paste to an electrode foil ( In other words, the electrode for the secondary battery is manufactured by a dry method by pressing a powder containing the electrode active material on the surface of the electrode foil (not wet).

  The electrode manufacturing apparatus 1 includes a powder supply apparatus 2 according to the first embodiment of the present invention, a conveying apparatus 3, a pressing apparatus 4, and the like, and the conveying apparatus 3 causes the electrode foil 5 that is a material to be supplied to be horizontal. The powder 10 is supplied to the electrode foil 5 by the powder supply device 2 while being conveyed at a constant speed in the predetermined feed direction α, and the powder 10 is deposited on the upper surface of the electrode foil 5.

  In the electrode manufacturing apparatus 1, the powder 10 is compressed by the pressing device 4 in a state where the powder 10 is deposited at a uniform density and height on the upper surface of the electrode foil 5, thereby forming the upper surface of the electrode foil 5. The composition layer 11 including the electrode active material is formed.

More specifically, the press device 4 in the electrode manufacturing apparatus 1 includes a pair of pressure rollers 4a and 4a whose axes are parallel to each other, and a gap set between the pressure rollers 4a and 4a. By passing the powder 10 and the electrode foil 5, the powder 10 is pressed and compressed to form the mixture layer 11 on the upper surface of the electrode foil 5.
The gap set between the pressure rollers 4a and 4a is a distance smaller than the height of the powder 10 deposited, and the pressure to be applied to the powder 10 and the desired mixture layer 11 The size of the gap is set in consideration of the thickness and the like.

  In this embodiment, the case where the powder supply apparatus 2 is used in the electrode manufacturing apparatus 1 for manufacturing an electrode for a secondary battery is illustrated, but the application of the powder supply apparatus according to the present invention is described. However, the present invention is not limited to this, and can be widely used for applications in which a powder-like supply object is supplied uniformly.

As shown in FIG. 1, the powder supply device 2 according to the first embodiment of the present invention supplies a fixed amount of powder 10 to an electrode foil 5 that is an object to be supplied, evenly dispersed. The device includes a case 6, a rotor 7, a mesh body 8, a discharge electrode 9, and the like.
Note that “equally disperse” in the present embodiment means that the weight per unit area of the powder 10 on the upper surface of the electrode foil 5 is uniform in any part.

Further, the powder supply device 2 is provided with a powder replenishing device, a powder amount detection sensor and the like (not shown).
In the powder supply device 2, the amount of the powder 10 stored in the case 6 is detected by a powder amount detection sensor (not shown), and the powder 10 in the case 6 has decreased from a predetermined amount. In this case, the powder 10 is supplied by a powder supply device (not shown), and the powder 10 in the case 6 is maintained at a predetermined amount or more.

The case 6 in the powder supply device 2 is arranged immediately below a powder supply device (not shown), and is configured so that the case 6 can receive the powder 10 supplied from the powder supply device and falling. Has been.
And it is set as the structure which drops and supplies the powder 10 from the case 6 with respect to the electrode foil 5 which is arrange | positioned vertically under the case 6 and is displaced toward the predetermined feed direction (alpha).
In addition, as an aspect of “falling” of the powder 10, there are an aspect in which the powder 10 is naturally dropped by its own weight, and an aspect in which the powder 10 is dropped while being pressed by the rotor 7.

The case 6 is a container for temporarily storing the powder 10 supplied from the powder replenishing device, and forms a storage portion 6a that is a gap for storing the powder 10.
And in case 6, while forming the inlet 6b which is an opening part for introducing the powder 10 in the upper end part of the storage part 6a, the opening for discharging | emitting the powder 10 in the lower end part of the storage part 6a It is set as the structure which forms the discharge port 6c which is a part.

The discharge port 6c is a rectangular opening that communicates with the reservoir 6a, and as shown in FIGS. 3A and 3B, the dimension in the length direction (long side direction in this embodiment) is L, It is formed as a rectangular opening whose dimension in the width direction (short side direction in this embodiment) is W.
The lower end surface of the discharge port 6c is formed horizontally, and the amount of the powder 10 discharged from the discharge port 6c is configured to be uniform at each part of the discharge port 6c.
The discharge port 6c has a width direction parallel to the feeding direction α of the electrode foil 5 and a length direction perpendicular to the feeding direction α of the electrode foil 5 in a plan view. It arrange | positions so that it may become (refer FIG. 1).

Moreover, in the powder supply apparatus 2 according to the first embodiment of the present invention, a member for equally dividing the discharge port 6c into a mesh shape in a mode of covering the entire surface of the discharge port 6c below the discharge port 6c. The mesh body 8 is arranged.
In the powder supply device 2, the powder 10 falling from the discharge port 6 c is passed through the mesh body 8, so that the lump-like powder 10 is reliably dispersed and the distribution of the powder 10 is achieved. Further, the density can be equalized, and the weight of the powder 10 adhering to the surface of the electrode foil 5 is more reliably equalized.

As shown in FIG. 2, in the powder supply device 2 according to the first embodiment of the present invention, the rotor 7 is disposed in the reservoir 6 a of the case 6.
The rotor 7 is disposed at an intermediate position between the inlet 6b and the outlet 6c in the reservoir 6a. When the rotor 7 rotates, it accumulates on the upper part of the rotor 7 (that is, on the inlet 6b side). The powder 10 is transferred to the lower part of the rotor 7 (that is, the discharge port 6c side).

As shown in FIG. 4, the rotor 7 in the powder supply apparatus 2 is a substantially brush-shaped member whose outer shape is a substantially cylindrical shape, and includes a shaft portion 7 a and a plurality of bristle members 7 b, 7 b. It is configured to provide.
The rotor 7 has the storage portion 6a with the shaft portion 7a oriented parallel to the length direction of the discharge port 6c and in a direction orthogonal to the feeding direction α of the electrode foil 5 in plan view. On the other hand, it is configured to be horizontally supported in a manner capable of rotating around the shaft portion 7a of the rotor 7.

Further, a plurality of bristle members 7b, 7b,... Are planted radially on the shaft portion 7a of the rotor 7 with the axis G of the shaft portion 7a as the center.
The bristle member 7b is a hairy body having elasticity, and when the bristle members 7b, 7b,... Are gathered to form a bush, the powder 10 between the bristle member 7b and the bristle member 7b in the bush. The rotor 7 is configured to hold the powder.
And the holding | maintenance amount of the powder 10 in the rotor 7 can be adjusted by changing the thickness of the bristle member 7b, the number, elasticity, planting density, etc.

Further, the diameter φQ of the circumscribed circle of the bristle members 7b, 7b... In the rotor 7 is larger than the diameter φP of the inscribed circle of the reservoir 6a, as shown in FIG. In the state of being housed in the reservoir 6a, the bristle members 7b, 7b,... Of the rotor 7 are in a state of being bent by being compressed in the radial direction, and the bristles are always in contact with the inner surface of the reservoir 6a. It is configured as follows.
And by such a structure, since the powder 10 adhering to the inner wall surface of the storage part 6a is swept at any time by the bristle members 7b, 7b, ..., the powder 10 adheres to the inner wall of the storage part 6a. Can be prevented.

Moreover, in case 6 which comprises the powder supply apparatus 2, the discharge port 6c is formed inside the inscribed circle of the storage part 6a, and the bristles of the bristle members 7b, 7b. It is comprised so that it may contact | abut inside the mesh body 8 provided (upper side).
And by such a structure, since the powder 10 stagnating in the mesh body 8 is swept at any time by the bristle members 7b, 7b..., Clogging of the mesh body 8 by the powder 10 is prevented. .

The bristle member 7b in the powder supply device 2 is made of a conductive material, and the powder 10 is electrically adsorbed to the bristle member 7b, and the powder 10 is separated from the bristle member 7b. It is prevented from disappearing.
Then, the bristle member 7b is configured to have conductivity, and the powder 10 can be separated from the bristle member 7b freely. It becomes possible to disperse.

Furthermore, in the powder supply apparatus 2 according to the first embodiment of the present invention, the discharge electrode 9 is a means for performing corona discharge on the powder 10 falling through the mesh body 8 below the mesh body 8. It is set as the structure provided with.
And the discharge electrode 9 is arrange | positioned in the range corresponding to the length L of the discharge port 6c below the discharge port 6c.

  The powder 10 may become a lump (granulated powder 10) by adsorbing particles constituting the powder 10, but such a lump disperses the powder 10 evenly. Can be a factor that inhibits

On the other hand, when corona discharge is performed on the powder 10 by the discharge electrode 9, the surface of the particles constituting the powder 10 is charged and the particles are electrically repelled. Can be solved.
For this reason, in the powder supply apparatus 2, the powder 10 is dispersed by the discharge electrode 9, so that the powder 10 is prevented from being damped, and the distribution of the powder 10 falling from the mesh body 8 is biased. I try not to make it happen.

  And the powder supply apparatus 2 is equipped with the rotor 7, the mesh body 8, and the discharge electrode 9, and the powder 10 supplied toward the electrode foil 5 from the discharge port 6c is the supply surface (the electrode foil 5) ( In this state, the weight per unit area on the supply surface is constant.

  In the powder supply device 2 according to the first embodiment of the present invention described here, the number of powder 10 supply systems (that is, the number of powder discharge ports in the case) is only one system. However, the powder supply apparatus according to the present invention may be configured to supply powder from a plurality of discharge ports to a material to be supplied as a structure including a plurality of reservoirs, rotors, and the like.

Here, the property of the powder 10 which is a supply object by the powder supply apparatus 2 according to the first embodiment of the present invention will be described with reference to FIG.
The powder 10 which is a supply object by the powder supply apparatus 2 provided in the electrode manufacturing apparatus 1 is a granulated particle manufactured from various substances for forming the composite material layer 11 on the surface of the electrode foil 5 which is a material to be supplied. And includes an electrode active material, a binder, a conductive material, and the like.

As shown in FIG. 5, each particle constituting the powder 10 has a particle size of about 50 to 120 μm, and has a property of being easily disintegrated by applying a shearing force.
Further, when each particle constituting the powder 10 is collapsed, fine particles having a particle diameter of about 1 to 10 μm are generated. By entering the space existing between the particles and filling the space, the powder is formed. The fluidity of the body 10 is reduced and the powder 10 is likely to be lumped.

  Further, the decrease in fluidity and the occurrence of lumps in the powder 10 can be a factor that hinders the powder supply device 2 from uniformly dispersing the powder 10, and therefore the rotor 7 used in the powder supply device 2 has a problem. Is required to be configured so as not to break the particles constituting the powder 10.

Therefore, in the powder supply apparatus 2 according to the first embodiment of the present invention, the rotor 7 having a plurality of bristle members 7b, 7b,.
The rotor 7 is configured so that the powder 10 is entangled and held by the elastic bristle members 7b, 7b, and the bristle members 7b, 7b, ... can be displaced and deformed. For this reason, the shearing force applied to the powder 10 is smaller than in the conventional case, and each particle constituting the powder 10 is difficult to break down.
And by such a structure, the fluidity | liquidity of the powder 10 is prevented from falling, and the powder supply apparatus 2 can disperse the powder 10 more reliably and evenly.

Next, changes with time in the amount of powder supplied by the powder supply apparatus 2 according to the first embodiment of the present invention will be described with reference to FIG.
Here, the powder supply device 2 according to the first embodiment of the present invention and the conventional powder supply device will be described while being compared.
And the conventional powder supply apparatus used in the experiment shown here is configured to include a substantially cylindrical rotor (referred to as a groove type) in which grooves having equal intervals in the circumferential direction are formed as a rotor.

As shown in FIG. 6, when the powder 10 is supplied using a conventional powder supply device including a groove type rotor, the powder 10 gradually increases with time if the powder 10 is continuously supplied. It can be seen that the supply amount of
This is because the groove type rotor cannot sweep the powder 10 adhering to the mesh body 8, so that the powder 10 gradually clogs the mesh body 8, thereby supplying the powder. It is considered that the supply amount of the powder 10 by the apparatus is decreasing.

On the other hand, as shown in FIG. 6, when the powder 10 is supplied by the powder supply device 2 including the (brush type) rotor 7 in which a plurality of bristle members 7b, 7b,. Even if 10 is continuously supplied, it can be confirmed that the supply amount of the powder 10 does not decrease over time.
This is because the brush-type rotor 7 can sweep the powder 10 adhering to the mesh body 8, and the powder 10 does not clog the mesh body 8. It is considered that the supply amount of the body 10 does not decrease.

  That is, according to the powder supply device 2 including the brush-like rotor 7, it is possible to prevent the supply state of the powder 10 from changing over time, and thus the powder 10 is more than the electrode foil 5. It is possible to continue the supply state while evenly dispersing.

  That is, in the powder supply device 2 according to the first embodiment of the present invention, a storage portion 6a that is a gap for temporarily storing the powder 10 that is a supply target is formed, and the storage portion 6a It has a charging port 6b which is an opening for charging the powder 10 formed at the upper end, and a discharge port 6c which is a rectangular opening for discharging the powder 10 formed at the lower end of the reservoir 6a. A case 6, a rotor 7 that is arranged in the case 6 and is rotated to transfer the powder 10 of the reservoir 6 a to the discharge port 6 c, and the powder 10 transferred to the discharge port 6 c And a mesh body 8 that covers the lower end of the discharge port 6c. The powder 10 is disposed on the upper surface of the electrode foil 5 that is the supply target of the powder 10 and is horizontally displaced vertically below the discharge port 6c. , Supplying while dropping from the discharge port 6c, The trochanter 7 has a brush-like configuration including a plurality of bristle members 7b, 7b,... Radially planted radially outward from the axis G of the rotor 7 as a center. is there.

  Moreover, in the powder supply apparatus 2 which concerns on 1st embodiment of this invention, several bristle members 7b * 7b ... have electroconductivity.

And according to the powder supply apparatus 22 which has such a structure, the powder 10 can be disperse | distributed uniformly, without destroying the particle | grains which comprise the powder 10. FIG.
Further, according to the powder supply device 22, the brush-like rotor 7 sweeps the powder 10 adhering to the inner wall of the reservoir 6a or the mesh body 8 to deposit the powder 10 in the reservoir 6a, The clogging of the powder 10 in the mesh body 8 can be prevented, and a stable supply state can be maintained.

  Moreover, the powder supply apparatus 2 which concerns on 1st embodiment of this invention is further provided with the 1st discharge electrode 9 which performs corona discharge with respect to the powder 10 which let the mesh body 8 pass.

  And according to the powder supply apparatus 22 which has such a structure, the powder 10 can be more uniformly disperse | distributed.

  Moreover, the powder 10 which is a supply object in the powder supply apparatus 2 according to the first embodiment of the present invention is a granulated particle including an electrode active material, a binder, and a conductive material.

  And according to the powder supply apparatus 22 which has such a structure, even if it is a case where the particle | grains which comprise the powder 10 are granulated particles which are easy to be destroyed, powder is not destroyed, 10 can be evenly distributed.

  In addition, the electrode manufacturing apparatus 1 according to an embodiment of the present invention is formed with a storage portion 6a that is a gap for temporarily storing the powder 10 that is a supply object, and is formed at the upper end of the storage portion 6a. A case 6 having an inlet 6b which is an opening for charging the powder 10 to be discharged, and a discharge opening 6c which is a rectangular opening for discharging the powder 10 formed at the lower end of the reservoir 6a; The rotor 7, which is disposed in the case 6 and rotates to transfer the powder 10 of the reservoir 6 a to the discharge port 6 c, and the powder 10 transferred to the discharge port 6 c are passed through. And a mesh body 8 that covers the lower end of the discharge port 6c. The powder 10 is placed on the upper surface of the electrode foil 5 that is a supply target of the powder 10 and is horizontally displaced vertically below the discharge port 6c. A powder supply device 2 for supplying while dropping from 6c; A transport device 3 that transports the electrode foil 5; and a press device 4 that presses the electrode foil 5 that is transported by the transport device 3 and is supplied with the powder 10 by the powder supply device 2. The rotor 7 has a brush-like form provided with a plurality of bristle members 7b, 7b,... That are substantially radially planted around the axis G of the rotor 7.

  According to the electrode manufacturing apparatus 1 having such a configuration, the electrode can be manufactured by uniformly dispersing the powder 10 in the electrode foil 5 without destroying the particles constituting the powder 10. Moreover, by this, the composite material layer 11 can be formed with uniform thickness, and the quality of the electrode can be improved.

Next, the overall configuration of the electrode manufacturing apparatus including the powder supply apparatus according to the second embodiment of the present invention will be described with reference to FIG.
In the following description, the direction of arrow A shown in FIG. 7 is defined as vertically upward, and the direction of arrow B is defined as vertically downward. And in the electrode manufacturing apparatus shown by this embodiment, it is set as the structure which supplies to the to-be-supplied material arrange | positioned under the powder supply apparatus by dropping powder from the upper direction with a powder supply apparatus.

  As shown in FIG. 7, an electrode manufacturing apparatus 21 according to an embodiment of the present invention manufactures an electrode for a secondary battery by a dry method in the same manner as the electrode manufacturing apparatus 1, and the second embodiment of the present invention. The powder supply device 22 according to the embodiment is provided.

  The powder supply device 22 according to the second embodiment of the present invention is similar to the powder supply device 2 according to the first embodiment of the present invention in that the case 6, the rotor 7, the mesh body 8, and the first In addition to the discharge electrode 9, the device further includes a squeegee 23, a second discharge electrode 24, a suction device 25, etc. In this respect, unlike the powder supply device 2 according to the first embodiment of the present invention. Yes.

The squeegee 23 is a part for leveling the powder 10 deposited on the electrode foil 5 to a predetermined deposition height, and is disposed downstream of the case 6 in the conveying direction of the electrode foil 5. A gap between the lower end of 23 and the electrode foil 5 is set to a predetermined distance.
Further, the squeegee 23 is provided in a range corresponding to the range of the length L of the discharge port 6c, and is provided with an inclined portion 23a on the upstream side of the electrode foil 5, which is a portion that reduces the gap toward the downstream side. In addition, on the downstream side of the inclined portion 23a, a horizontal portion 23b that forms a horizontal plane continuous with the inclined portion 23a is provided.
The squeegee 23 uses the inclined portion 23a and the horizontal portion 23b to level the powder 10 deposited on the upper surface of the electrode foil 5, and at the same time presses the pressing device 4 with the horizontal portion 23b having a predetermined distance from the electrode foil 5. Before being sent to, the deposition height of the powder 10 is made uniform.

The second discharge electrode 24 is a discharge electrode for performing corona discharge on the electrode foil 5, and is disposed on the upstream side of the case 6 in the conveying direction of the electrode foil 5.
And in the powder supply apparatus 22, it is set as the structure which removes foreign materials other than the powder 10 adhering to the electrode foil 5 by performing corona discharge with respect to the electrode foil 5 with the discharge electrode 24. FIG.
And in the powder supply apparatus 22, a corona discharge is performed with respect to the electrode foil 5 before the powder 10 is supplied, a foreign material is removed, and a powder from the case 6 is applied to the electrode foil 5 in a state where there is no foreign material. The body 10 is supplied.

In the powder supply device 22, the suction device 25 is arranged immediately above the second discharge electrode 24.
The suction device 25 includes a hood-like portion that covers the discharge electrode 24 above the second discharge electrode 24, and suction equipment (for example, a vacuum pipe or an exhaust duct) connected to the hood-like portion. It is configured.

  In the powder supply device 22, the foreign matter that has been charged by the second discharge electrode 24 and repels the electrode foil 5 is sucked by the suction device 25, so that the foreign matter becomes the electrode foil 5. In this case, the powder 10 can be supplied from the case 6 to the electrode foil 5 in a state where there is no foreign matter.

  That is, the powder supply apparatus 22 according to the second embodiment of the present invention further includes a squeegee 23 for leveling the powder 10 deposited on the upper surface of the electrode foil 5.

  Moreover, the powder supply apparatus 22 according to the second embodiment of the present invention includes a second discharge electrode 24 that performs corona discharge on the electrode foil 5 before the powder 10 is deposited, and a second discharge electrode 24. And a suction device 25 as suction means for sucking foreign matter released from the electrode foil 5 by corona discharge.

  And according to the powder supply apparatus 22 which has such a structure, the powder 10 can be more uniformly disperse | distributed.

DESCRIPTION OF SYMBOLS 1 Electrode manufacturing apparatus 2 Powder supply apparatus (1st embodiment)
5 Electrode foil (material to be supplied)
6 Case 6a Reservoir 7 Rotor 7b Bristle member 8 Mesh body 9 (First) discharge electrode 10 Powder (object to be supplied)
22 Powder supply device (second embodiment)
23 Squeegee 24 (Second) discharge electrode 25 Suction device

Claims (7)

A storage part that is a gap for temporarily storing powder as a supply object is formed, and an input port that is an opening for inputting the powder formed at the upper end of the storage part; and A case having a discharge port which is a rectangular opening for discharging the powder formed at the lower end of the reservoir;
A rotor that is disposed in the case and is a means for transferring the powder in the reservoir to the discharge port by rotating;
A mesh body that covers the lower end of the discharge port through which the powder transferred to the discharge port passes;
With
A powder supply device that horizontally displaces vertically below the discharge port, and supplies the powder while dropping from the discharge port onto an upper surface of a material to be supplied as the powder to be supplied,
The rotor is
It has a brush-like form provided with a plurality of bristle members that are implanted radially radially outwardly from the axis of the rotor.
The powder supply apparatus characterized by the above-mentioned. The plurality of bristle members are
Have conductivity,
The powder supply apparatus according to claim 1. A first discharge electrode that performs corona discharge on the powder that has passed through the mesh body;
Further comprising
The powder supply apparatus according to claim 1 or 2, characterized by the above. A squeegee for leveling the powder deposited on the upper surface of the material to be supplied;
Further comprising
The powder supply apparatus according to any one of claims 1 to 3, wherein: A second discharge electrode for corona discharge with respect to the material to be fed before the powder is deposited;
Suction means for sucking foreign matter released from the material to be supplied by corona discharge by the second discharge electrode;
Further comprising
The powder supply apparatus according to any one of claims 1 to 4, wherein the powder supply apparatus is characterized. The powder is
A granulated particle comprising an electrode active material, a binder, and a conductive material.
The powder supply apparatus according to any one of claims 1 to 5, wherein A storage part that is a gap for temporarily storing powder as a supply object is formed, and an input port that is an opening for inputting the powder formed at the upper end of the storage part; and A case having a discharge port which is a rectangular opening for discharging the powder formed at the lower end of the reservoir;
A rotor that is disposed in the case and is a means for transferring the powder in the reservoir to the discharge port by rotating;
A mesh body that covers the lower end of the discharge port through which the powder transferred to the discharge port passes;
With
A powder supply device that horizontally displaces vertically below the discharge port, and supplies the powder while dropping the powder from the discharge port to the upper surface of the material to be supplied of the powder;
A conveying device for conveying the material to be supplied;
A pressing device that presses the material to be supplied, the powder being supplied by the powder supply device, which is conveyed by the conveyance device;
An electrode manufacturing apparatus comprising:
The rotor is
Having a brush-like form with a plurality of bristle members implanted substantially radially about the axis of the rotor;
An electrode manufacturing apparatus.

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